{% extends 'layout/default.html.twig' %}

{% block content %}
    <div class="row">
        <div class="col-md-9">
            {% block main %}{% endblock %}
        </div>
        <div class="col-md-3">
            {% block sidebar %}
                <div class="card mb-3">
                    <div class="card-header">Site</div>
                    <div class="card-body">
                        Site navigation
                    </div>
                </div>
            {% endblock %}
        </div>
    </div>
{% endblock %}